Research of Green Moisture Monitoring Node Based on Hardware Modular Design

The node for building of wireless sensor network to monitor the moisture of urban green space based on the Modular design ideas was designed and implemented. Node is connected together by three separate boards, wireless transceiver, microprocessor and sensor backplane. In order to monitor the vertical distribution of the soil moisture, the sensor base plate is designed that it can access the 8-channel soil moisture sensor at the same time. The node has a time-sharing function. The test results show that the average current is 0.256 mA with the collection frequency of 30 seconds, it is 10 uA in sleeping mode. It can save power consumption than similar products by about 30.